MWRA's NPDES discharge permit for the Deer Island Wastewater Treatment Plant requires extensive monitoring and reporting.
MWRA monitors the effluent (treated sewage) that is
discharged into Massachusetts Bay, to ensure that it meets the standards
set out in the NPDES permit.
The Bay bacteria monitoring program, which measures water quality near the outfall to ensure that there is no risk to shellfish consumers.
The Ambient Monitoring Program addresses most Bay & outfall monitoring, as outlined in MWRA's Ambient Monitoring Plan.
Harbor & Rivers
The Massachusetts Water Resources Authority's (MWRA) has
been monitoring water quality in Boston Harbor and its tributaries since
1989. MWRA makes at least 20 visits
to each sampling location every year.
Monitoring areas are: Charles River,
Mystic River/Alewife Brook, Inner Harbor, Northern Dorchester Bay/Carson
Beach, Southern Dorchester Bay/Tenean Beach, Neponset River, and Quincy Bay/Wollaston
Water quality at Wollaston, Carson, Constitution,
Tenean and Pleasure Bay beaches is tested by the Department of Conservation
and Recreation (DCR) with assistance from MWRA.